The range of LED display applications is now very wide, and there are many manufacturers of LEDs , and the quality of the product models is also uneven. So, how should we distinguish the quality of LED display products ?
First of all, before we can distinguish the quality of LED display products, we must first understand the characteristics of LED display , and distinguish the advantages and disadvantages of LED display products from the performance .
　　 The performance of the LED display mainly includes the following aspects of grayscale, refresh rate, contrast, etc.:
Gray scale, also known as color scale or gray scale, refers to the brightness of the display screen, which is the decisive factor for the number of colors displayed on the LED display . In general, the higher the gray level of the LED display , the richer the color displayed, the more delicate the picture, and the easier it is to display rich details.
The refresh rate refers to the number of times the electron beam repeatedly scans the image on the screen. The higher the refresh rate, the better the stability of the screen displayed by the LED display , the higher the resolution of the display , the higher the brightness of the screen , and the People bring a very comfortable experience.
Contrast refers to the measurement of different brightness levels of light and dark areas in an image between the brightest and the darkest black and white, the greater the difference in range represents a higher contrast, and vice versa represents lower the contrast, the contrast of the visual impact of the LED display One of the key factors of the effect. In general, the higher the contrast, the sharper the image and the brighter the color. High contrast is very helpful for image sharpness, detail performance, and gray level performance.
Secondly, to distinguish the quality of the LED display , we can also feel from the intuitive visual effects:
1, the surface flatness of the LED display. The flatness of the surface of the display should be within ±1mm to ensure that the displayed image is not distorted. The convex or concave part of the screen will cause the viewing angle of the display to appear dead angle. We can see if the flatness of the screen is consistent by looking at the side of the screen and gently touching the surface of the screen. The quality of the flatness is mainly determined by the production process.
2 , white balance effect. Through the red, green and blue full color test and white balance test of the LED display products, we can see whether the LED display has a color cast phenomenon and adjust it in time.
3 , brightness and viewing angle. The brightness of indoor LED rental screen is generally between 800cd/m2-1200cd/m2 , and the brightness of outdoor LED rental screen should be above 1500cd/m2 to ensure the normal operation of the display. Otherwise, the brightness will be too low to see clearly. The image displayed.
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